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It essentially reduces the amount of cards used for a Fusion Monster by one, in that only one monster and a card such as "Mask Change" or "Form Change" is needed, as opposed to two or more monsters and "Polymerization".[1] However, the produced Fusion Monster tends to be less powerful than one Special Summoned by means of a regular Fusion Summon.

The TCG/OCG effect of "The Eye of Timaeus" resembles the mechanics of Transformation Summon, but it actually performs a Fusion Summon, using one Fusion Material.

The Japanese name for Transformation Summon (Henshin Shōkan) is a reference to the Kamen Rider series, whom the Masked HERO are based on. In this series, most of the Riders shout "Henshin" before transforming.